Eotary boiler



` K..HELLNEH.

ROTARY` BOILER.

APPLICATION FILED JUNE 3| 1919,

1,390,965. Patentedept- 13,1921.

A TTR/VEYS o zo UNITED STATES PATENT orifice.

naar. Hausmann, `or naLUN, swnbnn'.

ROTARY 301mm specification Leners Patent. Patented Sept. 13, 1921 Application filed June 3, 1919. Serial No. 301,552.

To all whom it may concern:

Beit known that I, KARL HnLLNnn, engineer, subject of the King of Sweden, residing at Falun, Sweden, have invented certain new and` useful Improvements in Rotary Boilers, (for which I have filed an a plication Ain Sweden, Ma 28, 1918, o o. 206148,) of which the fol owing, is a specification.`

The present invention relates to heating elements which are arranged outside the boiler, rotatedwith the boiler, and connected with theinner 'chamberof the boiler, so thatthe liquid` to be boiled may pass freely through the elements'and heated by means of pipes located in the boiler, which pipes are connected with the hollow shaft pins, so that the steam mayenterzone shaft pin .and the condensed steam` allowed to pass from the other shaft pin.

A. practical,` embodiment of my invention is re` resented in the iaccompanying drawing,

in w ich, o

Figure 1 represents an elevation of `my improved boiler, a portion of which is broken away to. show parts within.

Fig. 2 represents a plan view of the same.

Fig. V3 represents a longitudinal section, on an enlarged scale, of one of the heating elements. i

Fig. 4 represents a horizontal section taken in the plane of the line IV-IV of Fig. 3, looking in the `direction of the arrows, and o Fig. Eire resents ahorizontal section of a modified erm of boiler, on the same scale as Figs.` land 2. o

Theboiler, denoted by 1, is preferably of cylindrical form havin an upper spherical and a-lower conical pa ,and provided with hollow shaft pins 2, 3.

Heating elements 4 are arranged, in the resent instance, in sets of three upon oppow o site sides` of the boiler, parallel to its longitudinal axis and at right angles to the axis of rotation. These elements each consist of a flanged pipe of` suitable length and diameter ,"nd providedwith short angle branches near its ends, which branches have flanges arranged to be attachedtopipestuds" 5 on the boiler., Each element 4 is closed at its endsby end eces 7, 8. A steam pipe 9 is `ist arrangedin t e hollow shaft pin 2 and conneote with api e10 havinga T connection pipe` 1` loads `from one branch of the T connection l1 and is connected to oneA set of heating elements by branches 14, each of which 1s secured to an end piece 7 of the heatin elements. A pipe 13 leads from the other ranch of the T connection 11 and is connected to the other set of heating elements by branches 15, each of which` is secured to an end piece 7 i of its set of` heating elements. r

It should be noted that the upper end of the heatin elements 4 at the right of the shell 1 ig. 1) corresponds to theA lower end of the left hand elements. That is, steam enters at the upper end of the left hand elements 4 but at the lower end of the richt hand elements.

n Figs. 1 to 4 inclusive, each heating element is provided with a series of pipes 6, one end of each pipe `being fixed in af tube, sheet 23 which is secured between the heating element 4 and the fend piece The other end of each pipe is secured to a cup shaped member 24 which forms together with a tightening ring 25 and another, cup shaped member 26, a receptacle 28 forthe reception of the condensed steam passingfrom the pipe 6.

The members 24 and 26 'are drawn together on they tightening ring 25 by means end piece 8 of the heating element. The

pipe 29 isconnected with branches 16 extending outwardly from a pipe 17, which is coupled to the hollow shaft pin 3 by means `of pipes 18, a T connection 19 and a pipe 20, which enters the hollow shaft pin 3 and is connected to` the outlet pipe 21`of the shaft pin 3.

In the form shown in Fi 5, a passes through a hollow sha t pin 2 inside of the boiler 1 and is connected to a pipe 10', which passes outwardly through theboiler to a T connection 11*. From the T connection 11*, thearrangement of the pipes for the admisison of steam to` the heating element 4 is similar to that described pipe 9* in Figs. l to 4 inclusive. Theholo'w shaft pin 3* is provided with a steam outlet pipe 21*, which passes to the inside of the boiler 4and is connected with a pipe 20". This pipe 20* passes outwardly through the boiler to a T connection 19*. The arrangement `of l to the f pipes for the exhaust steam passing through the T connection 19* is similar to that described in Figs. l to 4 inclusive@ Y In Fig. 5, I have also shown each heating element 4 as having a single pipe 6*y through which the steam passes tovheat the fluid inthe element; In both forms shown, I provide perforated screens 22 so located in the boiler as to cover and protect the openings to the pipe studs 5, thereby preventing solid particles from entering lthe heating elements., y n It yWill be seen that by the construction andf arrangement by which the pipes o and 6* are mounted in the heating elements, a free expansion and contraction of the pipes isobtained(y Furthermore, the pipes may bereadilyremovedvfrom the heating elements,rfor cleaning and repairing and replaced with a minimum of labor and delay.

Itis also obviousthat a complete heating element may be removed or exchanged,

equally as Well,.as the pipe supporting devices. A l

While Ihave shown and described a boiler l arranged with its longitudinal axis at :right Vl"k comparatively sinall'in relationto the heatleo anglestotheaxisof rotation, it will also be understood that the arrangement may be ap- ',Duringeertain periods inthe manufacture rotationfof the boiler and hold the same in a `fined position. In this position the heating elements are vertically vdisposed with respect .to theflongitudinal axis of the boiler and Vfilled with fluid so that the steam may be passed ythrough the elements and discharged at the lower end, either through the shaft pin or a separate conduit removably coupled lto `the apparatus in any Well known manner. the fluid, surrounding the pipes in the ,heating elements, is jheated, it moves up- Lvvardly and entersthe boiler through the 50 uppermost pipe studs 5, While the less heated fluid Will enter the elements through the loWermostl pipe studs, thereby producing a uniform circulation of the fluid through the heating elementsfand boiler. The volume of fluidcontainedin the. heating elements is ing surface of the pipes in the elements with Whichtheliquid comes in contact, the result ofgwhich. isa: very.` active circulation of the fluidand an efficient heating obtained.

After the fluid. hasV been boil-ed the desired y time in-this ixedposition, the boiler may be rotated and the, steam regulated so as to pros duceauniform' condition ofthe boiled mate- .65

rial,k after Which'the rotation of the bQll may be stopped and prepared for the next heating process.

y reason of the boiler being rotated in the direction of the arrow shown in Fig. l, andthe heating elements moved in a longitudinal direction in planes perpendicular to the boiler shaft, the fluid will How freely and undisturbed along the heating surfaces of the elements and an effective, uniform and thorough heating of the fluid will result. As the heating surfaces in their movement are alternately brought into contact with the fluid, it has been found that no precipitations cover the pipes forming the heating surfaces, which therefore do not require much attention. The condensed steam is also discharged with the passage of steam through the pipes 6 in the opposite direction to the rotation of the boiler so that the conduction of heat may not be impaired.

Thus it will be seen that by the construction and arrangement of the parts a maximum production may be obtained With the minimum of operation due to the free passage of steam and the rotation of the parts.

What Iclaim as new and desire to secure by Letters Patent of the United States is:

l. A rotary boiler, characterized thereby, that outside the boiler there are arranged heating elements, provided with inner pipes for the passage of steam, said el-ements rotating with the boiler and permitting the boiling fluid to pass freely along the heated surfaces during the rotation, in order by this rotation to obtain a favorable fluid circulation through the heating elements along the heated surfaces, thereby effecting a uniform and effective heating of the goods.

2. A rotary boiler according to claim l, characterized thereby, that the heating elements are arranged in such a way, that steam supplied to their pipes passes through the pipes in opposite direction to the movement of the elements in order that the cond-ensed steam may easily be discharged by means of the rotation, thus effecting a free passage of the steam and the conduction of heat depending thereon.

3. A rotary boiler according to claim l, characterized thereby, that each heating element is of cylindrical shape and near the ends provided with sidevvise projecting, short branch pipes of suitable diameter with flanges. secured to corresponding short pipe `studs on the boiler, in order to obtain the shortest possible and vfree passage for the fluid to the heating elements, enabling the fluid to easily and Without disturbance fill up the space around the pipes, and then enter the boiler during the rotation.

4. A rotary boiler accordiiig'to claim l, characterized thereby, that the inner pipes in the heating element form a bundle of parallel pipes, having the one end secured to a tube sheet at the one end of .the heating el@- ment, where the steam enters, forming the one wall of the Huid receptacle, and the other end secured to a cu shaped member, which member together wlth another one, suitably 5 tightened and united, forms a closed champ ber for receiving and discharging the condensed steam, which is discharged through an outlet pipe from said chamber, said pipe extending through a acking box on the end 10 piece of the heating e ement, in order partly to permit free expansion of the pipes and partly to facilitate the removal of those pipes from the heating element for cleaning, repairment or exchange.

In testimony whereof I affix my signature 15 in presence of two witnesses.

KARL- HELLNER. Witnesses:

P. H. BERGROTH, GRETA PLIsN. 

